Molding machine



A ril 22, 1924. 1,491,646

P. H. VOGEL MOLDING MACHINE 2 Sheets-Sheet 1 A Filed June 2 1 ,eo

I'm/327mb Patented 22, 1924.

TES

PATENT PAUL HERMAN V OGEL, OF NEW BRITAIN, CONNECTICUT.

MOLDING MACHINE.

Application filed June 2, 1922. Serial No. 565,342.

To all whom it may concern:

Be it known that 1, PAUL H. VOGEL, a citizen of the United States, residing at New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Molding Machines, of which the following is a specification.

My invention relates to improvements in molding machines, having particular reference to machines for use in molding ferrules of the form that is common in use in plumbing installations, and the object of my improvement is to provide means for increasing the output per individual by reducing the hand operations and also to improve the quality of the product, the machine being adapted to other uses than making the particular article mentioned as will be evident from the description of the construction and arrangement of the parts, and also the method of operation, involving certain details as to the patterns and the flask.

In the accompanying drawing Figure 1 is a front elevation of my improved molding machine with the parts in the'position for inserting the patterns into the sand, there being two patterns for ferrule shown, a part of the extension frame of the flask being shown as broken away and exposing the sand that is enclosed thereby.

Figure 2 is an end elevation of the machine. I

Figure 3 is a plan view on an enlarged scale of the same, being also in part. broken away.

Figure {l is a front elevation that differs from Fig. 1, being on the same scale as said figure, in that the patterns are in the lowermost position, being entered into the sand.

Figure 5 is a View on an enlarged scale showing the plunger and pattern in section on the line 5-5 of Fig. 1 and in the position after the pattern has been entered into the sand.

Figure 6 is a sectional view on the line 6-6 of Fig. 4 with the plunger lowered to the lowermost position. 7

Figure 7 is a front elevation of the flask and the extension. V

Figure 8 a side elevation ofthe finished casting, the gate being indicated by broken lines.

My improved molding machine comprises as the main operating mechanism some form of a press, that shown being in the form of a screw-press, having a base board or platform 10 that is suitable to receive and support the molders flask 11.

Said platform 10 may itself be supported by means of suitable legs 12 and mounted upon its upper face are a pair of upwardly extending uprights 13 that are cross-connected at their upperends by a top plate 14:, these parts enclosing a substantially rectangular working space.

On the opposed inner faces of the uprights 13 are way-plates 15 that are provided with V-shaped grooves 16 that serve as guideways for the cooperating guide.- shoes 17 which are provided for the moving plate 18 to be described.

For moving said plate 18 a'pressure-sciew 19 is operatively, supported from the top plate 14 and has a hand-wheel 20.

As details, the guide-shoes 17 are eachpart of a bracket 21 of right-angled form. the

said shoe 17 being one branch thereof that is upwardly directed and a secondbranch 22 extending laterally for being connected to the plate 18, said brackets 21 being connected to the ends, of said plate 18. p

Also, at the middle of the moving'plate 18 is an upwardly directed threaded socket- 23 for cooperating with the pressurescrew 19. a

The moving plate 18, as shown, is of rectangular form and is approximately of the same size as the area of cross-section of the opposed open space that is enclosed by the flask 11, and the flask 11 is positioned on the platform 10 so that said moving plate 18 will substantially register therewith as it is lowered. v

Theinoving plate 18 supports the pattern and an auxiliary slide device in the form of a plunger to be described. I

In the particular apparatus shown two in'olds are made for each downward movement of the moving plate, there beingtwo patterns 24, positioned 'sideby side, and I The pattern 24 is used with the flange 30 uppermost and is supported from said flanged upper end by means of an individual plate 31 to which it is soldered.

Said individual plate 31 is secured to the under face of the moving plate 18 by screws. Each individual plate 31 is square and the two combined serve to substantially cover the under face of the moving plate 18.

The individual plate 31, furthermore, is provided with an opening 32 that is of the same size as the bore 28 of the pattern 24 and which is located in registration therewith.

The plunger 25 is of mushroom-shape, comprising at the lower end the laterally extended, plate-like or disc-like part 33 that is an operative fit for the opening 32 and an axially positioned part 34 that extends upwardly from said disc-like part 33 that is relatively extended andserves virtually as the plunger proper.

The cylinder member 26 is bored from the under side to provide an operating cylinder 35 for the plunger proper 34.

On the upper end of the cylinder member 26 and in line with the cylinder 35 is a boss 36 for operatively supporting the auxiliary pressure screw 37.

The lower end of said auxiliary pressure screw 37 is operatively connected to the plunger 25, a swivel connection between the parts being provided, and at the upper end thereof is a suitable gripping wheel 39. Check nuts 40 may be mounted on the screw 37 to limit the downward movement thereof.

In use, the check nuts 40 are adjusted so that in the lowermost position of the plunger 25 the bottom face 41 thereof will be flush with the bottom face 42 of the individual plate 31 to which the pattern 24 is secured, and the parts are constructed and arranged so that in the uppermost position of the plunger 25 the bottom face 41 of the plunger mentioned will be appreciably higher than the adjacent bottom face 42. This result is attained in the present instance by making the individual plate 31 appreciably thicker than the disc-like part 33 of the plunger 25.

As a further structural detail in operating my improved molding machine I provide an extension 43 for the flask 11 in the form of a rectangular border or frame platform 10 and during the operations of applying pressure to the sand.

The gate 46 is provided for in the usual manner in the cover for the flask 11 and is of any suitable form, being in the present instance in the form of a three-armed spider with the arms branching from a common sprue or pouring opening.

The excess sand 47 provided above the top edge 44 of the flask 11 by the use of the extra border or extension frame 43 is shown in F ig." 1 by the full lines above said top edge 4-4, the outline of said frame 43 being indicated by the broken lines.

In use, the extension frame 43 is first applied to the flask 11 and the combined container structure is filled with sand and then placed in position on the platform 10, the moving parts being all in the uppermost positions. The plungers 25 are also in the elevated position within the cylinders 35, the bottom face 41 of each being above the level of the bottom face 42 of the individual plate 31. That is to say, there is extra space above the pattern 24 in line with the bore 23 that is virtually an extension of the bore that;g1 is adapted to receive and be filled with san The ferrule represented in the drawings is a brass casting about 4% inches high, with a 4 inch bore, and the excess sand 47 shown in Fig. 1 may have a height of oneand onehalf inches.

With the fiask charged with sand as described and in position the machine is operated by first forcing the moving parts downwardly by operating the main hand-wheel 20, the first result being that the pattern 24 is forced into the sand so as to bring the supporting plates into. face to face contact with the sand, after which as the movement is continued the result is that the sand is compacted or rammed so as to provide a proper structure for the part of the mold that is exterior to the pattern 24. Also, sand will fill the bore 28 and will extend into the bore extension provided by the opening 32 in the individual plate 31, and which material is utilized for the formation of the core 48 of the finished mold.

Thus the bore 28 and the extension mentioned combine to form a chamber 49 that is adapted to receive sand as the movin parts are forced downwardly into and against the sand. The sand, however, that is forced into the chamber 49 is commingled with air and I find that in order to produce a satisfactory core 48 further action is needed on the sand that is housed within said chamber 49 and means for such further action are provided in the auxiliary pressure devices represented by the plungers 25. Said plungers 25 are finally forced downwardly for a suitable distance, with the result that the core structure 48 is properly sfihaped, with the material compacted and The patterns are next removed by reversing the movement of the main hand-wheel 20, such removal being facilitated by the use of vibrating devices of ordinary form.

I claim as my invention 1. A molding machine for making molds for ferrules and the like having a longitudinal opening comprising a frame having a platform for the flask, a main press structure supported from said platform having guideways at the sides and a main pressure device. intermediate said guideways, a moving plate operated by said pressure device and cooperating with said guideways, a pattern in the form of a cylindrical structure having a longitudinal opening, an individual plate secured to the under side of said moving plate and serving to support said pattern by one end in pendent position, an auxiliary pressure device supported by said moving plate and having a plunger positioned in alignment with said opening, and means for operating said plunger.

2. A molding machine as described in claim 1 in combination with a flask, said flask being adapted to house a mold from said pattern, and said flask being provided with means that are mounted on the upper border for cooperating with said flask in housing sand in the preliminary loose and unpacked condition.

3. In molding, the formation of a mold in sand for an article of generally cylindrical form and having an axial opening involving the provision of a pattern that corresponds in form to said article, means for forcing said pattern into the sand so as to enclose a body of sand along the axis, and means for ramming said axially positioned body of sand.

4. In molding, a pattern comprising a body having a longitudinal opening, an individual plate supporting said pattern by one end, and pressure means for being applied to said plate for forcing the pattern into the sand and simultaneously ramming the sand through the medium of said plate.

5. The method of molding, involving the formation of a mold in sand from a pattern which consists in supplying sand in loose condition, plunging a pattern into the sand, and ramming the sand, the ramming of the sand being effected from the same side as that from which the pattern is entered into the sand.

6. In a molding machine, a frame having a platform for the flask, a plate vertically movable in said frame toward the flask, a pattern in the form. of a cylindrical structure having a longitudinal opening mounted to depend from said plate, means for applying pressure to said plate to thrust said pattern toward the flask, and an auxiliary pressure device supported by said plate including a plunger positioned in alignment with the opening of said pattern so as to cooperate therewith.

PAUL HERMAN VOGEL. 

